function plotTrend(trend_base, trend_imp, legend_arr, ax)
%%

% yyaxis left

plot(ax, ...
    trend_base(:, 1), ...
    trend_base(:, 2), '-ob', 'MarkerSize', 3)
plot(ax, ...
    trend_imp(:, 1), ...
    trend_imp(:, 2), '-xr', 'MarkerSize', 3)
legend({legend_arr{1}; legend_arr{2};});
% ylim([0 1])